B1260

MULTIPLEX COMMUNICATION: MULTIPLEX COMMUNICATION SYSTEM: B1260: "P" Position Control ECU Stop

DTC B1260 - "P" Position Control ECU Stop

DESCRIPTION

This DTC is detected when communication between the transmission control ECU and gateway ECU stops for more than 10 seconds.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (HEV)
(a) Remove the HEV fuse from the engine room junction block.
(b) Measure the resistance.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK WIRE HARNESS (TRANSMISSION CONTROL ECU - BODY GROUND)




(a) Disconnect the T4 ECU connector.
(b) Measure the resistance and voltage between the wire harness side connector.
Standard resistance:






Standard voltage






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

3. CHECK RESISTANCE OF COMMUNICATION LINE




(a) Disconnect the T4, T5 and S11*1 or T11*2 ECU connectors.
(b) Measure the resistance of the wire harness side connectors.
Standard resistance:





HINT: *1: w/ Smart key system (for door lock)
*2: w/o Smart key system (for door lock)

Result:






C -- REPAIR OR REPLACE HARNESS AND CONNECTOR
B -- REPLACE TRANSMISSION CONTROL ECU AND REPAIR OR REPLACE HARNESS AND CONNECTOR
A -- REPLACE TRANSMISSION CONTROL ECU